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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.134 by root, Thu Jan 4 23:49:27 2007 UTC vs.
Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
…		…
31	#else	34	#else
32	# define PAGESIZE 0	35	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
34	#endif	37	#endif
35		38
36	#if USE_VALGRIND	39	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
38	#endif	44	#endif
39		45
40	/* the maximum number of idle cctx that will be pooled */	46	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	47	#define MAX_IDLE_CCTX 8
42		48
…		…
70	/* 5.8.7 */	76	/* 5.8.7 */
71	#ifndef SvRV_set	77	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	78	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	79	#endif
74		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	90	# undef CORO_STACKGUARD
77	#endif	91	#endif
78		92
79	#ifndef STACKGUARD	93	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	94	# define CORO_STACKGUARD 0
81	#endif	95	#endif
82		96
83	/* prefer perl internal functions over our own? */	97	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	99	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	100	#endif
87		101
88	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
93		106
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		108
96	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	113	#else
100	# define attribute(x)	114	# define attribute(x)
101	# define BARRIER	115	# define BARRIER
		116	# define expect(expr,value) (expr)
102	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
103		121
104	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
105		123
106	#include "CoroAPI.h"	124	#include "CoroAPI.h"
107		125
…		…
112	#else	130	#else
113	# define LOCK (void)0	131	# define LOCK (void)0
114	# define UNLOCK (void)0	132	# define UNLOCK (void)0
115	#endif	133	#endif
116		134
		135	/* helper storage struct for Coro::AIO */
117	struct io_state	136	struct io_state
118	{	137	{
119	int errorno;	138	int errorno;
120	I32 laststype;	139	I32 laststype;
121	int laststatval;	140	int laststatval;
122	Stat_t statcache;	141	Stat_t statcache;
123	};	142	};
124		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
125	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
126	static AV *main_mainstack; /* used to differentiate between $main and others */	146	static AV *main_mainstack; /* used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
127	static HV *coro_state_stash, *coro_stash;	148	static HV *coro_state_stash, *coro_stash;
128	static SV *coro_mortal; /* will be freed after next transfer */	149	static SV *coro_mortal; /* will be freed after next transfer */
129		150
		151	static GV *irsgv; /* $/ */
		152	static GV *stdoutgv; /* *STDOUT */
		153
		154	/* async_pool helper stuff */
		155	static SV *sv_pool_rss;
		156	static SV *sv_pool_size;
		157	static AV *av_async_pool;
		158
130	static struct coro_cctx *cctx_first;	159	static struct coro_cctx *cctx_first;
131	static int cctx_count, cctx_idle;	160	static int cctx_count, cctx_idle;
		161
		162	enum {
		163	CC_MAPPED = 0x01,
		164	CC_NOREUSE = 0x02, /* throw this away after tracing */
		165	CC_TRACE = 0x04,
		166	CC_TRACE_SUB = 0x08, /* trace sub calls */
		167	CC_TRACE_LINE = 0x10, /* trace each statement */
		168	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		169	};
132		170
133	/* this is a structure representing a c-level coroutine */	171	/* this is a structure representing a c-level coroutine */
134	typedef struct coro_cctx {	172	typedef struct coro_cctx {
135	struct coro_cctx *next;	173	struct coro_cctx *next;
136		174
137	/* the stack */	175	/* the stack */
138	void *sptr;	176	void *sptr;
139	long ssize; /* positive == mmap, otherwise malloc */	177	size_t ssize;
140		178
141	/* cpu state */	179	/* cpu state */
142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	180	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	181	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
144	JMPENV *top_env;	182	JMPENV *top_env;
145	coro_context cctx;	183	coro_context cctx;
146		184
147	int inuse;
148
149	#if USE_VALGRIND	185	#if CORO_USE_VALGRIND
150	int valgrind_id;	186	int valgrind_id;
151	#endif	187	#endif
		188	unsigned char flags;
152	} coro_cctx;	189	} coro_cctx;
153		190
154	enum {	191	enum {
155	CF_RUNNING = 0x0001, /* coroutine is running */	192	CF_RUNNING = 0x0001, /* coroutine is running */
156	CF_READY = 0x0002, /* coroutine is ready */	193	CF_READY = 0x0002, /* coroutine is ready */
157	CF_NEW = 0x0004, /* has never been switched to */	194	CF_NEW = 0x0004, /* has never been switched to */
158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	195	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
159	};	196	};
160		197
		198	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		199	typedef struct {
		200	SV *defsv;
		201	AV *defav;
		202	SV *errsv;
		203	SV *irsgv;
		204	#define VAR(name,type) type name;
		205	# include "state.h"
		206	#undef VAR
		207	} perl_slots;
		208
		209	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		210
161	/* this is a structure representing a perl-level coroutine */	211	/* this is a structure representing a perl-level coroutine */
162	struct coro {	212	struct coro {
163	/* the c coroutine allocated to this perl coroutine, if any */	213	/* the c coroutine allocated to this perl coroutine, if any */
164	coro_cctx *cctx;	214	coro_cctx *cctx;
165		215
		216	/* process data */
		217	AV *mainstack;
		218	perl_slots *slot; /* basically the saved sp */
		219
166	/* data associated with this coroutine (initial args) */	220	/* data associated with this coroutine (initial args) */
167	AV *args;	221	AV *args;
168	int refcnt;	222	int refcnt;
169	int save; /* CORO_SAVE flags */
170	int flags; /* CF_ flags */	223	int flags; /* CF_ flags */
171		224
172	/* optionally saved, might be zero */	225	/* statistics */
173	AV *defav; /* @_ */	226	int usecount; /* number of transfers to this coro */
174	SV *defsv; /* $_ */
175	SV *errsv; /* $@ */
176	SV *irssv; /* $/ */
177	SV *irssv_sv; /* real $/ cache */
178
179	#define VAR(name,type) type name;
180	# include "state.h"
181	#undef VAR
182		227
183	/* coro process data */	228	/* coro process data */
184	int prio;	229	int prio;
		230	SV *throw;
		231
		232	/* async_pool */
		233	SV *saved_deffh;
		234
		235	/* linked list */
		236	struct coro *next, *prev;
		237	HV *hv; /* the perl hash associated with this coro, if any */
185	};	238	};
186		239
187	typedef struct coro *Coro__State;	240	typedef struct coro *Coro__State;
188	typedef struct coro *Coro__State_or_hashref;	241	typedef struct coro *Coro__State_or_hashref;
189		242
		243	/** Coro ********************************************************************/
		244
		245	#define PRIO_MAX 3
		246	#define PRIO_HIGH 1
		247	#define PRIO_NORMAL 0
		248	#define PRIO_LOW -1
		249	#define PRIO_IDLE -3
		250	#define PRIO_MIN -4
		251
		252	/* for Coro.pm */
		253	static SV *coro_current;
		254	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		255	static int coro_nready;
		256	static struct coro *coro_first;
		257
		258	/** lowlevel stuff **********************************************************/
		259
190	static AV *	260	static AV *
191	coro_clone_padlist (CV *cv)	261	coro_clone_padlist (pTHX_ CV *cv)
192	{	262	{
193	AV *padlist = CvPADLIST (cv);	263	AV *padlist = CvPADLIST (cv);
194	AV *newpadlist, *newpad;	264	AV *newpadlist, *newpad;
195		265
196	newpadlist = newAV ();	266	newpadlist = newAV ();
…		…
208		278
209	return newpadlist;	279	return newpadlist;
210	}	280	}
211		281
212	static void	282	static void
213	free_padlist (AV *padlist)	283	free_padlist (pTHX_ AV *padlist)
214	{	284	{
215	/* may be during global destruction */	285	/* may be during global destruction */
216	if (SvREFCNT (padlist))	286	if (SvREFCNT (padlist))
217	{	287	{
218	I32 i = AvFILLp (padlist);	288	I32 i = AvFILLp (padlist);
…		…
239	AV *padlist;	309	AV *padlist;
240	AV *av = (AV *)mg->mg_obj;	310	AV *av = (AV *)mg->mg_obj;
241		311
242	/* casting is fun. */	312	/* casting is fun. */
243	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	313	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
244	free_padlist (padlist);	314	free_padlist (aTHX_ padlist);
245		315
246	SvREFCNT_dec (av);	316	SvREFCNT_dec (av);
247		317
248	return 0;	318	return 0;
249	}	319	}
…		…
257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	327	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
258	? SvMAGIC (cv) \	328	? SvMAGIC (cv) \
259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	329	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
260	: 0	330	: 0
261		331
		332	static struct coro *
		333	SvSTATE_ (pTHX_ SV *coro)
		334	{
		335	HV *stash;
		336	MAGIC *mg;
		337
		338	if (SvROK (coro))
		339	coro = SvRV (coro);
		340
		341	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		342	croak ("Coro::State object required");
		343
		344	stash = SvSTASH (coro);
		345	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		346	{
		347	/* very slow, but rare, check */
		348	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		349	croak ("Coro::State object required");
		350	}
		351
		352	mg = CORO_MAGIC (coro);
		353	return (struct coro *)mg->mg_ptr;
		354	}
		355
		356	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		357
262	/* the next two functions merely cache the padlists */	358	/* the next two functions merely cache the padlists */
263	static void	359	static void
264	get_padlist (CV *cv)	360	get_padlist (pTHX_ CV *cv)
265	{	361	{
266	MAGIC *mg = CORO_MAGIC (cv);	362	MAGIC *mg = CORO_MAGIC (cv);
267	AV *av;	363	AV *av;
268		364
269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	365	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	366	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
271	else	367	else
272	{	368	{
273	#if PREFER_PERL_FUNCTIONS	369	#if CORO_PREFER_PERL_FUNCTIONS
274	/* this is probably cleaner, but also slower? */	370	/* this is probably cleaner, but also slower? */
275	CV *cp = Perl_cv_clone (cv);	371	CV *cp = Perl_cv_clone (cv);
276	CvPADLIST (cv) = CvPADLIST (cp);	372	CvPADLIST (cv) = CvPADLIST (cp);
277	CvPADLIST (cp) = 0;	373	CvPADLIST (cp) = 0;
278	SvREFCNT_dec (cp);	374	SvREFCNT_dec (cp);
279	#else	375	#else
280	CvPADLIST (cv) = coro_clone_padlist (cv);	376	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
281	#endif	377	#endif
282	}	378	}
283	}	379	}
284		380
285	static void	381	static void
286	put_padlist (CV *cv)	382	put_padlist (pTHX_ CV *cv)
287	{	383	{
288	MAGIC *mg = CORO_MAGIC (cv);	384	MAGIC *mg = CORO_MAGIC (cv);
289	AV *av;	385	AV *av;
290		386
291	if (!mg)	387	if (expect_false (!mg))
292	{	388	{
293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	389	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	390	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
295	mg->mg_virtual = &vtbl_coro;	391	mg->mg_virtual = &vtbl_coro;
296	mg->mg_obj = (SV *)newAV ();	392	mg->mg_obj = (SV *)newAV ();
297	}	393	}
298		394
299	av = (AV *)mg->mg_obj;	395	av = (AV *)mg->mg_obj;
300		396
301	if (AvFILLp (av) >= AvMAX (av))	397	if (expect_false (AvFILLp (av) >= AvMAX (av)))
302	av_extend (av, AvMAX (av) + 1);	398	av_extend (av, AvMAX (av) + 1);
303		399
304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	400	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
305	}	401	}
306		402
307	#define SB do {	403	/** load & save, init *******************************************************/
308	#define SE } while (0)
309		404
310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
311
312	static void	405	static void
313	load_perl (Coro__State c)	406	load_perl (pTHX_ Coro__State c)
314	{	407	{
		408	perl_slots *slot = c->slot;
		409	c->slot = 0;
		410
		411	PL_mainstack = c->mainstack;
		412
		413	GvSV (PL_defgv) = slot->defsv;
		414	GvAV (PL_defgv) = slot->defav;
		415	GvSV (PL_errgv) = slot->errsv;
		416	GvSV (irsgv) = slot->irsgv;
		417
315	#define VAR(name,type) PL_ ## name = c->name;	418	#define VAR(name,type) PL_ ## name = slot->name;
316	# include "state.h"	419	# include "state.h"
317	#undef VAR	420	#undef VAR
318
319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
322	if (c->irssv)
323	{
324	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
325	SvREFCNT_dec (c->irssv);
326	else
327	{
328	REPLACE_SV (PL_rs, c->irssv);
329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
330	sv_setsv (c->irssv_sv, PL_rs);
331	}
332	}
333		421
334	{	422	{
335	dSP;	423	dSP;
		424
336	CV *cv;	425	CV *cv;
337		426
338	/* now do the ugly restore mess */	427	/* now do the ugly restore mess */
339	while ((cv = (CV *)POPs))	428	while (expect_true (cv = (CV *)POPs))
340	{	429	{
341	put_padlist (cv); /* mark this padlist as available */	430	put_padlist (aTHX_ cv); /* mark this padlist as available */
342	CvDEPTH (cv) = PTR2IV (POPs);	431	CvDEPTH (cv) = PTR2IV (POPs);
343	CvPADLIST (cv) = (AV *)POPs;	432	CvPADLIST (cv) = (AV *)POPs;
344	}	433	}
345		434
346	PUTBACK;	435	PUTBACK;
347	}	436	}
348	}	437	}
349		438
350	static void	439	static void
351	save_perl (Coro__State c)	440	save_perl (pTHX_ Coro__State c)
352	{	441	{
353	{	442	{
354	dSP;	443	dSP;
355	I32 cxix = cxstack_ix;	444	I32 cxix = cxstack_ix;
356	PERL_CONTEXT *ccstk = cxstack;	445	PERL_CONTEXT *ccstk = cxstack;
…		…
359	/*	448	/*
360	* the worst thing you can imagine happens first - we have to save	449	* the worst thing you can imagine happens first - we have to save
361	* (and reinitialize) all cv's in the whole callchain :(	450	* (and reinitialize) all cv's in the whole callchain :(
362	*/	451	*/
363		452
364	EXTEND (SP, 3 + 1);
365	PUSHs (Nullsv);	453	XPUSHs (Nullsv);
366	/* this loop was inspired by pp_caller */	454	/* this loop was inspired by pp_caller */
367	for (;;)	455	for (;;)
368	{	456	{
369	while (cxix >= 0)	457	while (expect_true (cxix >= 0))
370	{	458	{
371	PERL_CONTEXT *cx = &ccstk[cxix--];	459	PERL_CONTEXT *cx = &ccstk[cxix--];
372		460
373	if (CxTYPE (cx) == CXt_SUB)	461	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
374	{	462	{
375	CV *cv = cx->blk_sub.cv;	463	CV *cv = cx->blk_sub.cv;
376		464
377	if (CvDEPTH (cv))	465	if (expect_true (CvDEPTH (cv)))
378	{	466	{
379	EXTEND (SP, 3);	467	EXTEND (SP, 3);
380	PUSHs ((SV *)CvPADLIST (cv));	468	PUSHs ((SV *)CvPADLIST (cv));
381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	469	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
382	PUSHs ((SV *)cv);	470	PUSHs ((SV *)cv);
383		471
384	CvDEPTH (cv) = 0;	472	CvDEPTH (cv) = 0;
385	get_padlist (cv);	473	get_padlist (aTHX_ cv);
386	}	474	}
387	}	475	}
388	}	476	}
389		477
390	if (top_si->si_type == PERLSI_MAIN)	478	if (expect_true (top_si->si_type == PERLSI_MAIN))
391	break;	479	break;
392		480
393	top_si = top_si->si_prev;	481	top_si = top_si->si_prev;
394	ccstk = top_si->si_cxstack;	482	ccstk = top_si->si_cxstack;
395	cxix = top_si->si_cxix;	483	cxix = top_si->si_cxix;
396	}	484	}
397		485
398	PUTBACK;	486	PUTBACK;
399	}	487	}
400		488
401	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	489	/* allocate some space on the context stack for our purposes */
402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	490	{
403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	491	/* we manually unroll here, as usually 2 slots is enough */
404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	492	int i;
		493	if (SLOT_COUNT >= 1) CXINC;
		494	if (SLOT_COUNT >= 2) CXINC;
		495	if (SLOT_COUNT >= 3) CXINC;
		496	for (i = 3; i < SLOT_COUNT; ++i)
		497	CXINC;
405		498
		499	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		500	}
		501
		502	c->mainstack = PL_mainstack;
		503
		504	{
		505	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		506
		507	slot->defav = GvAV (PL_defgv);
		508	slot->defsv = DEFSV;
		509	slot->errsv = ERRSV;
		510	slot->irsgv = GvSV (irsgv);
		511
406	#define VAR(name,type)c->name = PL_ ## name;	512	#define VAR(name,type) slot->name = PL_ ## name;
407	# include "state.h"	513	# include "state.h"
408	#undef VAR	514	#undef VAR
		515	}
409	}	516	}
410		517
411	/*	518	/*
412	* allocate various perl stacks. This is an exact copy	519	* allocate various perl stacks. This is an exact copy
413	* of perl.c:init_stacks, except that it uses less memory	520	* of perl.c:init_stacks, except that it uses less memory
414	* on the (sometimes correct) assumption that coroutines do	521	* on the (sometimes correct) assumption that coroutines do
415	* not usually need a lot of stackspace.	522	* not usually need a lot of stackspace.
416	*/	523	*/
417	#if PREFER_PERL_FUNCTIONS	524	#if CORO_PREFER_PERL_FUNCTIONS
418	# define coro_init_stacks init_stacks	525	# define coro_init_stacks init_stacks
419	#else	526	#else
420	static void	527	static void
421	coro_init_stacks ()	528	coro_init_stacks (pTHX)
422	{	529	{
423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	530	PL_curstackinfo = new_stackinfo(32, 8);
424	PL_curstackinfo->si_type = PERLSI_MAIN;	531	PL_curstackinfo->si_type = PERLSI_MAIN;
425	PL_curstack = PL_curstackinfo->si_stack;	532	PL_curstack = PL_curstackinfo->si_stack;
426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	533	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
427		534
428	PL_stack_base = AvARRAY(PL_curstack);	535	PL_stack_base = AvARRAY(PL_curstack);
429	PL_stack_sp = PL_stack_base;	536	PL_stack_sp = PL_stack_base;
430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	537	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
431		538
432	New(50,PL_tmps_stack,128,SV*);	539	New(50,PL_tmps_stack,32,SV*);
433	PL_tmps_floor = -1;	540	PL_tmps_floor = -1;
434	PL_tmps_ix = -1;	541	PL_tmps_ix = -1;
435	PL_tmps_max = 128;	542	PL_tmps_max = 32;
436		543
437	New(54,PL_markstack,32,I32);	544	New(54,PL_markstack,16,I32);
438	PL_markstack_ptr = PL_markstack;	545	PL_markstack_ptr = PL_markstack;
439	PL_markstack_max = PL_markstack + 32;	546	PL_markstack_max = PL_markstack + 16;
440		547
441	#ifdef SET_MARK_OFFSET	548	#ifdef SET_MARK_OFFSET
442	SET_MARK_OFFSET;	549	SET_MARK_OFFSET;
443	#endif	550	#endif
444		551
445	New(54,PL_scopestack,32,I32);	552	New(54,PL_scopestack,8,I32);
446	PL_scopestack_ix = 0;	553	PL_scopestack_ix = 0;
447	PL_scopestack_max = 32;	554	PL_scopestack_max = 8;
448		555
449	New(54,PL_savestack,64,ANY);	556	New(54,PL_savestack,24,ANY);
450	PL_savestack_ix = 0;	557	PL_savestack_ix = 0;
451	PL_savestack_max = 64;	558	PL_savestack_max = 24;
452		559
453	#if !PERL_VERSION_ATLEAST (5,9,0)	560	#if !PERL_VERSION_ATLEAST (5,9,0)
454	New(54,PL_retstack,16,OP*);	561	New(54,PL_retstack,4,OP*);
455	PL_retstack_ix = 0;	562	PL_retstack_ix = 0;
456	PL_retstack_max = 16;	563	PL_retstack_max = 4;
457	#endif	564	#endif
458	}	565	}
459	#endif	566	#endif
460		567
461	/*	568	/*
462	* destroy the stacks, the callchain etc...	569	* destroy the stacks, the callchain etc...
463	*/	570	*/
464	static void	571	static void
465	coro_destroy_stacks ()	572	coro_destroy_stacks (pTHX)
466	{	573	{
467	if (!IN_DESTRUCT)
468	{
469	/* restore all saved variables and stuff */
470	LEAVE_SCOPE (0);
471	assert (PL_tmps_floor == -1);
472
473	/* free all temporaries */
474	FREETMPS;
475	assert (PL_tmps_ix == -1);
476
477	/* unwind all extra stacks */
478	POPSTACK_TO (PL_mainstack);
479
480	/* unwind main stack */
481	dounwind (-1);
482	}
483
484	while (PL_curstackinfo->si_next)	574	while (PL_curstackinfo->si_next)
485	PL_curstackinfo = PL_curstackinfo->si_next;	575	PL_curstackinfo = PL_curstackinfo->si_next;
486		576
487	while (PL_curstackinfo)	577	while (PL_curstackinfo)
488	{	578	{
…		…
503	#if !PERL_VERSION_ATLEAST (5,9,0)	593	#if !PERL_VERSION_ATLEAST (5,9,0)
504	Safefree (PL_retstack);	594	Safefree (PL_retstack);
505	#endif	595	#endif
506	}	596	}
507		597
508	static void	598	static size_t
509	setup_coro (struct coro *coro)	599	coro_rss (pTHX_ struct coro *coro)
		600	{
		601	size_t rss = sizeof (*coro);
		602
		603	if (coro->mainstack)
		604	{
		605	perl_slots tmp_slot;
		606	perl_slots *slot;
		607
		608	if (coro->flags & CF_RUNNING)
		609	{
		610	slot = &tmp_slot;
		611
		612	#define VAR(name,type) slot->name = PL_ ## name;
		613	# include "state.h"
		614	#undef VAR
		615	}
		616	else
		617	slot = coro->slot;
		618
		619	rss += sizeof (slot->curstackinfo);
		620	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		621	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		622	rss += slot->tmps_max * sizeof (SV *);
		623	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		624	rss += slot->scopestack_max * sizeof (I32);
		625	rss += slot->savestack_max * sizeof (ANY);
		626
		627	#if !PERL_VERSION_ATLEAST (5,9,0)
		628	rss += slot->retstack_max * sizeof (OP *);
		629	#endif
		630	}
		631
		632	return rss;
		633	}
		634
		635	/** coroutine stack handling ************************************************/
		636
		637	static void
		638	coro_setup (pTHX_ struct coro *coro)
510	{	639	{
511	/*	640	/*
512	* emulate part of the perl startup here.	641	* emulate part of the perl startup here.
513	*/	642	*/
514
515	coro_init_stacks ();	643	coro_init_stacks (aTHX);
516		644
		645	PL_runops = RUNOPS_DEFAULT;
517	PL_curcop = &PL_compiling;	646	PL_curcop = &PL_compiling;
518	PL_in_eval = EVAL_NULL;	647	PL_in_eval = EVAL_NULL;
		648	PL_comppad = 0;
519	PL_curpm = 0;	649	PL_curpm = 0;
		650	PL_curpad = 0;
520	PL_localizing = 0;	651	PL_localizing = 0;
521	PL_dirty = 0;	652	PL_dirty = 0;
522	PL_restartop = 0;	653	PL_restartop = 0;
		654	PL_diehook = 0;
		655	PL_warnhook = 0;
		656
		657	GvSV (PL_defgv) = newSV (0);
		658	GvAV (PL_defgv) = coro->args; coro->args = 0;
		659	GvSV (PL_errgv) = newSV (0);
		660	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		661	PL_rs = newSVsv (GvSV (irsgv));
		662	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
523		663
524	{	664	{
525	dSP;	665	dSP;
526	LOGOP myop;	666	LOGOP myop;
527		667
528	SvREFCNT_dec (GvAV (PL_defgv));
529	GvAV (PL_defgv) = coro->args; coro->args = 0;
530
531	Zero (&myop, 1, LOGOP);	668	Zero (&myop, 1, LOGOP);
532	myop.op_next = Nullop;	669	myop.op_next = Nullop;
533	myop.op_flags = OPf_WANT_VOID;	670	myop.op_flags = OPf_WANT_VOID;
534		671
535	PUSHMARK (SP);	672	PUSHMARK (SP);
536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	673	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
537	PUTBACK;	674	PUTBACK;
538	PL_op = (OP *)&myop;	675	PL_op = (OP *)&myop;
539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
540	SPAGAIN;	677	SPAGAIN;
541	}	678	}
542		679
543	ENTER; /* necessary e.g. for dounwind */	680	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
544	}	681	}
545		682
546	static void	683	static void
		684	coro_destroy (pTHX_ struct coro *coro)
		685	{
		686	if (!IN_DESTRUCT)
		687	{
		688	/* restore all saved variables and stuff */
		689	LEAVE_SCOPE (0);
		690	assert (PL_tmps_floor == -1);
		691
		692	/* free all temporaries */
		693	FREETMPS;
		694	assert (PL_tmps_ix == -1);
		695
		696	/* unwind all extra stacks */
		697	POPSTACK_TO (PL_mainstack);
		698
		699	/* unwind main stack */
		700	dounwind (-1);
		701	}
		702
		703	SvREFCNT_dec (GvSV (PL_defgv));
		704	SvREFCNT_dec (GvAV (PL_defgv));
		705	SvREFCNT_dec (GvSV (PL_errgv));
		706	SvREFCNT_dec (PL_defoutgv);
		707	SvREFCNT_dec (PL_rs);
		708	SvREFCNT_dec (GvSV (irsgv));
		709
		710	SvREFCNT_dec (PL_diehook);
		711	SvREFCNT_dec (PL_warnhook);
		712
		713	SvREFCNT_dec (coro->saved_deffh);
		714	SvREFCNT_dec (coro->throw);
		715
		716	coro_destroy_stacks (aTHX);
		717	}
		718
		719	static void
547	free_coro_mortal ()	720	free_coro_mortal (pTHX)
548	{	721	{
549	if (coro_mortal)	722	if (expect_true (coro_mortal))
550	{	723	{
551	SvREFCNT_dec (coro_mortal);	724	SvREFCNT_dec (coro_mortal);
552	coro_mortal = 0;	725	coro_mortal = 0;
553	}	726	}
554	}	727	}
555		728
		729	static int
		730	runops_trace (pTHX)
		731	{
		732	COP *oldcop = 0;
		733	int oldcxix = -2;
		734	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		735	coro_cctx *cctx = coro->cctx;
		736
		737	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		738	{
		739	PERL_ASYNC_CHECK ();
		740
		741	if (cctx->flags & CC_TRACE_ALL)
		742	{
		743	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		744	{
		745	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		746	SV **bot, **top;
		747	AV *av = newAV (); /* return values */
		748	SV **cb;
		749	dSP;
		750
		751	GV *gv = CvGV (cx->blk_sub.cv);
		752	SV *fullname = sv_2mortal (newSV (0));
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	bot = PL_stack_base + cx->blk_oldsp + 1;
		757	top = cx->blk_gimme == G_ARRAY ? SP + 1
		758	: cx->blk_gimme == G_SCALAR ? bot + 1
		759	: bot;
		760
		761	av_extend (av, top - bot);
		762	while (bot < top)
		763	av_push (av, SvREFCNT_inc (*bot++));
		764
		765	PL_runops = RUNOPS_DEFAULT;
		766	ENTER;
		767	SAVETMPS;
		768	EXTEND (SP, 3);
		769	PUSHMARK (SP);
		770	PUSHs (&PL_sv_no);
		771	PUSHs (fullname);
		772	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		773	PUTBACK;
		774	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		775	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		776	SPAGAIN;
		777	FREETMPS;
		778	LEAVE;
		779	PL_runops = runops_trace;
		780	}
		781
		782	if (oldcop != PL_curcop)
		783	{
		784	oldcop = PL_curcop;
		785
		786	if (PL_curcop != &PL_compiling)
		787	{
		788	SV **cb;
		789
		790	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		791	{
		792	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		793
		794	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		795	{
		796	runops_proc_t old_runops = PL_runops;
		797	dSP;
		798	GV *gv = CvGV (cx->blk_sub.cv);
		799	SV *fullname = sv_2mortal (newSV (0));
		800
		801	if (isGV (gv))
		802	gv_efullname3 (fullname, gv, 0);
		803
		804	PL_runops = RUNOPS_DEFAULT;
		805	ENTER;
		806	SAVETMPS;
		807	EXTEND (SP, 3);
		808	PUSHMARK (SP);
		809	PUSHs (&PL_sv_yes);
		810	PUSHs (fullname);
		811	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		812	PUTBACK;
		813	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		814	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		815	SPAGAIN;
		816	FREETMPS;
		817	LEAVE;
		818	PL_runops = runops_trace;
		819	}
		820
		821	oldcxix = cxstack_ix;
		822	}
		823
		824	if (cctx->flags & CC_TRACE_LINE)
		825	{
		826	dSP;
		827
		828	PL_runops = RUNOPS_DEFAULT;
		829	ENTER;
		830	SAVETMPS;
		831	EXTEND (SP, 3);
		832	PL_runops = RUNOPS_DEFAULT;
		833	PUSHMARK (SP);
		834	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		835	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		836	PUTBACK;
		837	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		838	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		839	SPAGAIN;
		840	FREETMPS;
		841	LEAVE;
		842	PL_runops = runops_trace;
		843	}
		844	}
		845	}
		846	}
		847	}
		848
		849	TAINT_NOT;
		850	return 0;
		851	}
		852
556	/* inject a fake call to Coro::State::_cctx_init into the execution */	853	/* inject a fake call to Coro::State::_cctx_init into the execution */
		854	/* _cctx_init should be careful, as it could be called at almost any time */
		855	/* during execution of a perl program */
557	static void NOINLINE	856	static void NOINLINE
558	prepare_cctx (coro_cctx *cctx)	857	prepare_cctx (pTHX_ coro_cctx *cctx)
559	{	858	{
560	dSP;	859	dSP;
561	LOGOP myop;	860	LOGOP myop;
		861
		862	PL_top_env = &PL_start_env;
		863
		864	if (cctx->flags & CC_TRACE)
		865	PL_runops = runops_trace;
562		866
563	Zero (&myop, 1, LOGOP);	867	Zero (&myop, 1, LOGOP);
564	myop.op_next = PL_op;	868	myop.op_next = PL_op;
565	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	869	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
566		870
…		…
572	PL_op = (OP *)&myop;	876	PL_op = (OP *)&myop;
573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	877	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
574	SPAGAIN;	878	SPAGAIN;
575	}	879	}
576		880
		881	/*
		882	* this is a _very_ stripped down perl interpreter ;)
		883	*/
577	static void	884	static void
578	coro_run (void *arg)	885	coro_run (void *arg)
579	{	886	{
		887	dTHX;
		888
580	/* coro_run is the alternative tail of transfer(), so unlock here. */	889	/* coro_run is the alternative tail of transfer(), so unlock here. */
581	UNLOCK;	890	UNLOCK;
582		891
583	/*	892	/* we now skip the entersub that lead to transfer() */
584	* this is a _very_ stripped down perl interpreter ;)	893	PL_op = PL_op->op_next;
585	*/
586	PL_top_env = &PL_start_env;
587		894
588	/* inject call to cctx_init */	895	/* inject a fake subroutine call to cctx_init */
589	prepare_cctx ((coro_cctx *)arg);	896	prepare_cctx (aTHX_ (coro_cctx *)arg);
590		897
591	/* somebody will hit me for both perl_run and PL_restartop */	898	/* somebody or something will hit me for both perl_run and PL_restartop */
592	PL_restartop = PL_op;	899	PL_restartop = PL_op;
593	perl_run (PL_curinterp);	900	perl_run (PL_curinterp);
594		901
595	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	902	/*
596	abort ();	903	* If perl-run returns we assume exit() was being called or the coro
		904	* fell off the end, which seems to be the only valid (non-bug)
		905	* reason for perl_run to return. We try to exit by jumping to the
		906	* bootstrap-time "top" top_env, as we cannot restore the "main"
		907	* coroutine as Coro has no such concept
		908	*/
		909	PL_top_env = main_top_env;
		910	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
597	}	911	}
598		912
599	static coro_cctx *	913	static coro_cctx *
600	cctx_new ()	914	cctx_new ()
601	{	915	{
602	coro_cctx *cctx;	916	coro_cctx *cctx;
		917	void *stack_start;
		918	size_t stack_size;
603		919
604	++cctx_count;	920	++cctx_count;
605		921
606	Newz (0, cctx, 1, coro_cctx);	922	Newz (0, cctx, 1, coro_cctx);
607		923
608	#if HAVE_MMAP	924	#if HAVE_MMAP
609		925
610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	926	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
611	/* mmap supposedly does allocate-on-write for us */	927	/* mmap supposedly does allocate-on-write for us */
612	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	928	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
613		929
614	if (cctx->sptr == (void *)-1)	930	if (cctx->sptr != (void *)-1)
615	{
616	perror ("FATAL: unable to mmap stack for coroutine");
617	_exit (EXIT_FAILURE);
618	}	931	{
619
620	# if STACKGUARD	932	# if CORO_STACKGUARD
621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	933	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
622	# endif	934	# endif
		935	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		936	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		937	cctx->flags |= CC_MAPPED;
		938	}
		939	else
		940	#endif
		941	{
		942	cctx->ssize = coro_stacksize * (long)sizeof (long);
		943	New (0, cctx->sptr, coro_stacksize, long);
623		944
624	#else
625
626	cctx->ssize = STACKSIZE * (long)sizeof (long);
627	New (0, cctx->sptr, STACKSIZE, long);
628
629	if (!cctx->sptr)	945	if (!cctx->sptr)
630	{	946	{
631	perror ("FATAL: unable to malloc stack for coroutine");	947	perror ("FATAL: unable to allocate stack for coroutine");
632	_exit (EXIT_FAILURE);	948	_exit (EXIT_FAILURE);
633	}	949	}
634		950
635	#endif	951	stack_start = cctx->sptr;
		952	stack_size = cctx->ssize;
		953	}
636		954
637	#if USE_VALGRIND	955	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
640	cctx->ssize + (char *)cctx->sptr
641	);
642	#endif
643
644	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	956	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
645		957
646	return cctx;	958	return cctx;
647	}	959	}
648		960
649	static void	961	static void
…		…
652	if (!cctx)	964	if (!cctx)
653	return;	965	return;
654		966
655	--cctx_count;	967	--cctx_count;
656		968
657	#if USE_VALGRIND	969	#if CORO_USE_VALGRIND
658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	970	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
659	#endif	971	#endif
660		972
661	#if HAVE_MMAP	973	#if HAVE_MMAP
		974	if (cctx->flags & CC_MAPPED)
662	munmap (cctx->sptr, cctx->ssize);	975	munmap (cctx->sptr, cctx->ssize);
663	#else	976	else
		977	#endif
664	Safefree (cctx->sptr);	978	Safefree (cctx->sptr);
665	#endif
666		979
667	Safefree (cctx);	980	Safefree (cctx);
668	}	981	}
669		982
		983	/* wether this cctx should be destructed */
		984	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		985
670	static coro_cctx *	986	static coro_cctx *
671	cctx_get ()	987	cctx_get (pTHX)
672	{	988	{
673	coro_cctx *cctx;	989	while (expect_true (cctx_first))
674
675	if (cctx_first)
676	{	990	{
677	cctx = cctx_first;	991	coro_cctx *cctx = cctx_first;
678	cctx_first = cctx->next;	992	cctx_first = cctx->next;
679	--cctx_idle;	993	--cctx_idle;
680	}	994
681	else	995	if (expect_true (!CCTX_EXPIRED (cctx)))
682	{	996	return cctx;
683	cctx = cctx_new ();	997
684	PL_op = PL_op->op_next;	998	cctx_destroy (cctx);
685	}	999	}
686		1000
687	return cctx;	1001	return cctx_new ();
688	}	1002	}
689		1003
690	static void	1004	static void
691	cctx_put (coro_cctx *cctx)	1005	cctx_put (coro_cctx *cctx)
692	{	1006	{
693	/* free another cctx if overlimit */	1007	/* free another cctx if overlimit */
694	if (cctx_idle >= MAX_IDLE_CCTX)	1008	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
695	{	1009	{
696	coro_cctx *first = cctx_first;	1010	coro_cctx *first = cctx_first;
697	cctx_first = first->next;	1011	cctx_first = first->next;
698	--cctx_idle;	1012	--cctx_idle;
699		1013
700	assert (!first->inuse);
701	cctx_destroy (first);	1014	cctx_destroy (first);
702	}	1015	}
703		1016
704	++cctx_idle;	1017	++cctx_idle;
705	cctx->next = cctx_first;	1018	cctx->next = cctx_first;
706	cctx_first = cctx;	1019	cctx_first = cctx;
707	}	1020	}
708		1021
709	/* never call directly, always through the coro_state_transfer global variable */	1022	/** coroutine switching *****************************************************/
		1023
		1024	static void
		1025	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1026	{
		1027	if (expect_true (prev != next))
		1028	{
		1029	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1030	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1031
		1032	if (expect_false (next->flags & CF_RUNNING))
		1033	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1034
		1035	if (expect_false (next->flags & CF_DESTROYED))
		1036	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1037
		1038	if (
		1039	#if PERL_VERSION_ATLEAST (5,9,0)
		1040	expect_false (PL_parser)
		1041	#else
		1042	expect_false (PL_lex_state != LEX_NOTPARSING)
		1043	#endif
		1044	)
		1045	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1046	}
		1047	}
		1048
		1049	/* always use the TRANSFER macro */
710	static void NOINLINE	1050	static void NOINLINE
711	transfer (struct coro *prev, struct coro *next)	1051	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	1052	{
713	dSTACKLEVEL;	1053	dSTACKLEVEL;
714		1054
715	/* sometimes transfer is only called to set idle_sp */	1055	/* sometimes transfer is only called to set idle_sp */
716	if (!next)	1056	if (expect_false (!next))
717	{	1057	{
718	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1058	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
719	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1059	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
720	}	1060	}
721	else if (prev != next)	1061	else if (expect_true (prev != next))
722	{	1062	{
723	coro_cctx *prev__cctx;	1063	coro_cctx *prev__cctx;
724		1064
725	if (prev->flags & CF_NEW)	1065	if (expect_false (prev->flags & CF_NEW))
726	{	1066	{
727	/* create a new empty context */	1067	/* create a new empty context */
728	Newz (0, prev->cctx, 1, coro_cctx);	1068	Newz (0, prev->cctx, 1, coro_cctx);
729	prev->cctx->inuse = 1;
730	prev->flags &= ~CF_NEW;	1069	prev->flags &= ~CF_NEW;
731	prev->flags |= CF_RUNNING;	1070	prev->flags |= CF_RUNNING;
732	}	1071	}
733		1072
734	/*TODO: must not croak here */
735	if (!prev->flags & CF_RUNNING)
736	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
737
738	if (next->flags & CF_RUNNING)
739	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
740
741	if (next->flags & CF_DESTROYED)
742	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
743
744	prev->flags &= ~CF_RUNNING;	1073	prev->flags &= ~CF_RUNNING;
745	next->flags |= CF_RUNNING;	1074	next->flags |= CF_RUNNING;
746		1075
747	LOCK;	1076	LOCK;
748		1077
749	if (next->flags & CF_NEW)	1078	if (expect_false (next->flags & CF_NEW))
750	{	1079	{
751	/* need to start coroutine */	1080	/* need to start coroutine */
752	next->flags &= ~CF_NEW;	1081	next->flags &= ~CF_NEW;
753	/* first get rid of the old state */	1082	/* first get rid of the old state */
754	save_perl (prev);	1083	save_perl (aTHX_ prev);
755	/* setup coroutine call */	1084	/* setup coroutine call */
756	setup_coro (next);	1085	coro_setup (aTHX_ next);
757	/* need a new stack */
758	assert (!next->cctx);
759	}	1086	}
760	else	1087	else
761	{	1088	{
762	/* coroutine already started */	1089	/* coroutine already started */
763	save_perl (prev);	1090	save_perl (aTHX_ prev);
764	load_perl (next);	1091	load_perl (aTHX_ next);
765	}	1092	}
766		1093
767	prev__cctx = prev->cctx;	1094	prev__cctx = prev->cctx;
768		1095
769	/* possibly "free" the cctx */	1096	/* possibly "free" the cctx */
770	if (prev__cctx->idle_sp == STACKLEVEL)	1097	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
771	{	1098	{
772	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1099	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
773	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1100	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
774		1101
775	prev->cctx = 0;	1102	prev->cctx = 0;
776		1103
		1104	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1105	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1106	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1107	next->cctx = cctx_get (aTHX);
		1108
777	cctx_put (prev__cctx);	1109	cctx_put (prev__cctx);
778	prev__cctx->inuse = 0;
779	}	1110	}
780		1111
		1112	++next->usecount;
		1113
781	if (!next->cctx)	1114	if (expect_true (!next->cctx))
782	{
783	next->cctx = cctx_get ();	1115	next->cctx = cctx_get (aTHX);
784	assert (!next->cctx->inuse);
785	next->cctx->inuse = 1;
786	}
787		1116
788	if (prev__cctx != next->cctx)	1117	if (expect_false (prev__cctx != next->cctx))
789	{	1118	{
790	prev__cctx->top_env = PL_top_env;	1119	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	1120	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1121	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	1122	}
794		1123
795	free_coro_mortal ();	1124	free_coro_mortal (aTHX);
796	UNLOCK;	1125	UNLOCK;
		1126
		1127	if (expect_false (prev->throw || next->throw))
		1128	{
		1129	struct coro *coro = SvSTATE (coro_current);
		1130
		1131	if (coro->throw)
		1132	{
		1133	SV *exception = coro->throw;
		1134	coro->throw = 0;
		1135	sv_setsv (ERRSV, exception);
		1136	croak (0);
		1137	}
		1138	}
797	}	1139	}
798	}	1140	}
799		1141
800	struct transfer_args	1142	struct transfer_args
801	{	1143	{
802	struct coro *prev, *next;	1144	struct coro *prev, *next;
803	};	1145	};
804		1146
805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1147	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1148	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1149
		1150	/** high level stuff ********************************************************/
806		1151
807	static int	1152	static int
808	coro_state_destroy (struct coro *coro)	1153	coro_state_destroy (pTHX_ struct coro *coro)
809	{	1154	{
810	if (coro->flags & CF_DESTROYED)	1155	if (coro->flags & CF_DESTROYED)
811	return 0;	1156	return 0;
812		1157
813	coro->flags |= CF_DESTROYED;	1158	coro->flags |= CF_DESTROYED;
		1159
		1160	if (coro->flags & CF_READY)
		1161	{
		1162	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1163	/* alternative: look through all ready queues and remove the coro */
		1164	LOCK;
		1165	--coro_nready;
		1166	UNLOCK;
		1167	}
		1168	else
		1169	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
814		1170
815	if (coro->mainstack && coro->mainstack != main_mainstack)	1171	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	1172	{
817	assert (!(coro->flags & CF_RUNNING));
818
819	struct coro temp;	1173	struct coro temp;
820	Zero (&temp, 1, struct coro);
821	temp.save = CORO_SAVE_ALL;
822		1174
823	if (coro->flags & CF_RUNNING)	1175	if (coro->flags & CF_RUNNING)
824	croak ("FATAL: tried to destroy currently running coroutine");	1176	croak ("FATAL: tried to destroy currently running coroutine");
825		1177
826	save_perl (&temp);	1178	save_perl (aTHX_ &temp);
827	load_perl (coro);	1179	load_perl (aTHX_ coro);
828		1180
829	coro_destroy_stacks ();	1181	coro_destroy (aTHX_ coro);
830		1182
831	load_perl (&temp); /* this will get rid of defsv etc.. */	1183	load_perl (aTHX_ &temp);
832		1184
833	coro->mainstack = 0;	1185	coro->slot = 0;
834	}	1186	}
835		1187
836	cctx_destroy (coro->cctx);	1188	cctx_destroy (coro->cctx);
837	SvREFCNT_dec (coro->args);	1189	SvREFCNT_dec (coro->args);
838		1190
		1191	if (coro->next) coro->next->prev = coro->prev;
		1192	if (coro->prev) coro->prev->next = coro->next;
		1193	if (coro == coro_first) coro_first = coro->next;
		1194
839	return 1;	1195	return 1;
840	}	1196	}
841		1197
842	static int	1198	static int
843	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1199	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
844	{	1200	{
845	struct coro *coro = (struct coro *)mg->mg_ptr;	1201	struct coro *coro = (struct coro *)mg->mg_ptr;
846	mg->mg_ptr = 0;	1202	mg->mg_ptr = 0;
847		1203
		1204	coro->hv = 0;
		1205
848	if (--coro->refcnt < 0)	1206	if (--coro->refcnt < 0)
849	{	1207	{
850	coro_state_destroy (coro);	1208	coro_state_destroy (aTHX_ coro);
851	Safefree (coro);	1209	Safefree (coro);
852	}	1210	}
853		1211
854	return 0;	1212	return 0;
855	}	1213	}
…		…
873	#else	1231	#else
874	# define MGf_DUP 0	1232	# define MGf_DUP 0
875	#endif	1233	#endif
876	};	1234	};
877		1235
878	static struct coro *
879	SvSTATE (SV *coro)
880	{
881	HV *stash;
882	MAGIC *mg;
883
884	if (SvROK (coro))
885	coro = SvRV (coro);
886
887	stash = SvSTASH (coro);
888	if (stash != coro_stash && stash != coro_state_stash)
889	{
890	/* very slow, but rare, check */
891	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
892	croak ("Coro::State object required");
893	}
894
895	mg = SvMAGIC (coro);
896	assert (mg->mg_type == PERL_MAGIC_ext);
897	return (struct coro *)mg->mg_ptr;
898	}
899
900	static void	1236	static void
901	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1237	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
902	{	1238	{
903	ta->prev = SvSTATE (prev_sv);	1239	ta->prev = SvSTATE (prev_sv);
904	ta->next = SvSTATE (next_sv);	1240	ta->next = SvSTATE (next_sv);
		1241	TRANSFER_CHECK (*ta);
905	}	1242	}
906		1243
907	static void	1244	static void
908	api_transfer (SV *prev_sv, SV *next_sv)	1245	api_transfer (SV *prev_sv, SV *next_sv)
909	{	1246	{
		1247	dTHX;
910	struct transfer_args ta;	1248	struct transfer_args ta;
911		1249
912	prepare_transfer (&ta, prev_sv, next_sv);	1250	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
913	TRANSFER (ta);	1251	TRANSFER (ta);
914	}	1252	}
915		1253
916	static int
917	api_save (SV *coro_sv, int new_save)
918	{
919	struct coro *coro = SvSTATE (coro_sv);
920	int old_save = coro->save;
921
922	if (new_save >= 0)
923	coro->save = new_save;
924
925	return old_save;
926	}
927
928	/** Coro ********************************************************************/	1254	/** Coro ********************************************************************/
929		1255
930	#define PRIO_MAX 3
931	#define PRIO_HIGH 1
932	#define PRIO_NORMAL 0
933	#define PRIO_LOW -1
934	#define PRIO_IDLE -3
935	#define PRIO_MIN -4
936
937	/* for Coro.pm */
938	static SV *coro_current;
939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
940	static int coro_nready;
941
942	static void	1256	static void
943	coro_enq (SV *coro_sv)	1257	coro_enq (pTHX_ SV *coro_sv)
944	{	1258	{
945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1259	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
946	coro_nready++;
947	}	1260	}
948		1261
949	static SV *	1262	static SV *
950	coro_deq (int min_prio)	1263	coro_deq (pTHX_ int min_prio)
951	{	1264	{
952	int prio = PRIO_MAX - PRIO_MIN;	1265	int prio = PRIO_MAX - PRIO_MIN;
953		1266
954	min_prio -= PRIO_MIN;	1267	min_prio -= PRIO_MIN;
955	if (min_prio < 0)	1268	if (min_prio < 0)
956	min_prio = 0;	1269	min_prio = 0;
957		1270
958	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1271	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
959	if (AvFILLp (coro_ready [prio]) >= 0)	1272	if (AvFILLp (coro_ready [prio]) >= 0)
960	{
961	coro_nready--;
962	return av_shift (coro_ready [prio]);	1273	return av_shift (coro_ready [prio]);
963	}
964		1274
965	return 0;	1275	return 0;
966	}	1276	}
967		1277
968	static int	1278	static int
969	api_ready (SV *coro_sv)	1279	api_ready (SV *coro_sv)
970	{	1280	{
		1281	dTHX;
971	struct coro *coro;	1282	struct coro *coro;
972		1283
973	if (SvROK (coro_sv))	1284	if (SvROK (coro_sv))
974	coro_sv = SvRV (coro_sv);	1285	coro_sv = SvRV (coro_sv);
975		1286
…		…
979	return 0;	1290	return 0;
980		1291
981	coro->flags |= CF_READY;	1292	coro->flags |= CF_READY;
982		1293
983	LOCK;	1294	LOCK;
984	coro_enq (SvREFCNT_inc (coro_sv));	1295	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1296	++coro_nready;
985	UNLOCK;	1297	UNLOCK;
986		1298
987	return 1;	1299	return 1;
988	}	1300	}
989		1301
990	static int	1302	static int
991	api_is_ready (SV *coro_sv)	1303	api_is_ready (SV *coro_sv)
992	{	1304	{
		1305	dTHX;
993	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1306	return !!(SvSTATE (coro_sv)->flags & CF_READY);
994	}	1307	}
995		1308
996	static void	1309	static void
997	prepare_schedule (struct transfer_args *ta)	1310	prepare_schedule (pTHX_ struct transfer_args *ta)
998	{	1311	{
999	SV *prev_sv, *next_sv;	1312	SV *prev_sv, *next_sv;
1000		1313
1001	for (;;)	1314	for (;;)
1002	{	1315	{
1003	LOCK;	1316	LOCK;
1004	next_sv = coro_deq (PRIO_MIN);	1317	next_sv = coro_deq (aTHX_ PRIO_MIN);
1005	UNLOCK;
1006		1318
1007	/* nothing to schedule: call the idle handler */	1319	/* nothing to schedule: call the idle handler */
1008	if (!next_sv)	1320	if (expect_false (!next_sv))
1009	{	1321	{
1010	dSP;	1322	dSP;
		1323	UNLOCK;
1011		1324
1012	ENTER;	1325	ENTER;
1013	SAVETMPS;	1326	SAVETMPS;
1014		1327
1015	PUSHMARK (SP);	1328	PUSHMARK (SP);
…		…
1022	}	1335	}
1023		1336
1024	ta->next = SvSTATE (next_sv);	1337	ta->next = SvSTATE (next_sv);
1025		1338
1026	/* cannot transfer to destroyed coros, skip and look for next */	1339	/* cannot transfer to destroyed coros, skip and look for next */
1027	if (ta->next->flags & CF_DESTROYED)	1340	if (expect_false (ta->next->flags & CF_DESTROYED))
1028	{	1341	{
		1342	UNLOCK;
1029	SvREFCNT_dec (next_sv);	1343	SvREFCNT_dec (next_sv);
		1344	/* coro_nready is already taken care of by destroy */
1030	continue;	1345	continue;
1031	}	1346	}
1032		1347
		1348	--coro_nready;
		1349	UNLOCK;
1033	break;	1350	break;
1034	}	1351	}
1035		1352
1036	/* free this only after the transfer */	1353	/* free this only after the transfer */
1037	prev_sv = SvRV (coro_current);	1354	prev_sv = SvRV (coro_current);
1038	SvRV_set (coro_current, next_sv);
1039	ta->prev = SvSTATE (prev_sv);	1355	ta->prev = SvSTATE (prev_sv);
1040		1356	TRANSFER_CHECK (*ta);
1041	assert (ta->next->flags & CF_READY);	1357	assert (ta->next->flags & CF_READY);
1042	ta->next->flags &= ~CF_READY;	1358	ta->next->flags &= ~CF_READY;
		1359	SvRV_set (coro_current, next_sv);
1043		1360
1044	LOCK;	1361	LOCK;
1045	free_coro_mortal ();	1362	free_coro_mortal (aTHX);
1046	coro_mortal = prev_sv;	1363	coro_mortal = prev_sv;
1047	UNLOCK;	1364	UNLOCK;
1048	}	1365	}
1049		1366
1050	static void	1367	static void
1051	prepare_cede (struct transfer_args *ta)	1368	prepare_cede (pTHX_ struct transfer_args *ta)
1052	{	1369	{
1053	api_ready (coro_current);	1370	api_ready (coro_current);
1054	prepare_schedule (ta);	1371	prepare_schedule (aTHX_ ta);
1055	}	1372	}
1056		1373
1057	static int	1374	static int
1058	prepare_cede_notself (struct transfer_args *ta)	1375	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1059	{	1376	{
1060	if (coro_nready)	1377	if (coro_nready)
1061	{	1378	{
1062	SV *prev = SvRV (coro_current);	1379	SV *prev = SvRV (coro_current);
1063	prepare_schedule (ta);	1380	prepare_schedule (aTHX_ ta);
1064	api_ready (prev);	1381	api_ready (prev);
1065	return 1;	1382	return 1;
1066	}	1383	}
1067	else	1384	else
1068	return 0;	1385	return 0;
1069	}	1386	}
1070		1387
1071	static void	1388	static void
1072	api_schedule (void)	1389	api_schedule (void)
1073	{	1390	{
		1391	dTHX;
1074	struct transfer_args ta;	1392	struct transfer_args ta;
1075		1393
1076	prepare_schedule (&ta);	1394	prepare_schedule (aTHX_ &ta);
1077	TRANSFER (ta);	1395	TRANSFER (ta);
1078	}	1396	}
1079		1397
1080	static int	1398	static int
1081	api_cede (void)	1399	api_cede (void)
1082	{	1400	{
		1401	dTHX;
1083	struct transfer_args ta;	1402	struct transfer_args ta;
1084		1403
1085	prepare_cede (&ta);	1404	prepare_cede (aTHX_ &ta);
1086		1405
1087	if (ta.prev != ta.next)	1406	if (expect_true (ta.prev != ta.next))
1088	{	1407	{
1089	TRANSFER (ta);	1408	TRANSFER (ta);
1090	return 1;	1409	return 1;
1091	}	1410	}
1092	else	1411	else
…		…
1094	}	1413	}
1095		1414
1096	static int	1415	static int
1097	api_cede_notself (void)	1416	api_cede_notself (void)
1098	{	1417	{
		1418	dTHX;
1099	struct transfer_args ta;	1419	struct transfer_args ta;
1100		1420
1101	if (prepare_cede_notself (&ta))	1421	if (prepare_cede_notself (aTHX_ &ta))
1102	{	1422	{
1103	TRANSFER (ta);	1423	TRANSFER (ta);
1104	return 1;	1424	return 1;
1105	}	1425	}
1106	else	1426	else
1107	return 0;	1427	return 0;
1108	}	1428	}
1109		1429
		1430	static void
		1431	api_trace (SV *coro_sv, int flags)
		1432	{
		1433	dTHX;
		1434	struct coro *coro = SvSTATE (coro_sv);
		1435
		1436	if (flags & CC_TRACE)
		1437	{
		1438	if (!coro->cctx)
		1439	coro->cctx = cctx_new ();
		1440	else if (!(coro->cctx->flags & CC_TRACE))
		1441	croak ("cannot enable tracing on coroutine with custom stack");
		1442
		1443	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1444	}
		1445	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1446	{
		1447	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1448
		1449	if (coro->flags & CF_RUNNING)
		1450	PL_runops = RUNOPS_DEFAULT;
		1451	else
		1452	coro->slot->runops = RUNOPS_DEFAULT;
		1453	}
		1454	}
		1455
1110	MODULE = Coro::State PACKAGE = Coro::State	1456	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1111		1457
1112	PROTOTYPES: DISABLE	1458	PROTOTYPES: DISABLE
1113		1459
1114	BOOT:	1460	BOOT:
1115	{	1461	{
1116	#ifdef USE_ITHREADS	1462	#ifdef USE_ITHREADS
1117	MUTEX_INIT (&coro_mutex);	1463	MUTEX_INIT (&coro_mutex);
1118	#endif	1464	#endif
1119	BOOT_PAGESIZE;	1465	BOOT_PAGESIZE;
1120		1466
		1467	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1468	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1469
1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1470	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1122		1471
		1472	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1473	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1474	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1125	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1126	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1127	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1475	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1128		1476
1129	main_mainstack = PL_mainstack;	1477	main_mainstack = PL_mainstack;
		1478	main_top_env = PL_top_env;
		1479
		1480	while (main_top_env->je_prev)
		1481	main_top_env = main_top_env->je_prev;
1130		1482
1131	coroapi.ver = CORO_API_VERSION;	1483	coroapi.ver = CORO_API_VERSION;
1132	coroapi.transfer = api_transfer;	1484	coroapi.transfer = api_transfer;
1133		1485
1134	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1486	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1141	struct coro *coro;	1493	struct coro *coro;
1142	HV *hv;	1494	HV *hv;
1143	int i;	1495	int i;
1144		1496
1145	Newz (0, coro, 1, struct coro);	1497	Newz (0, coro, 1, struct coro);
1146	coro->args = newAV ();	1498	coro->args = newAV ();
1147	coro->save = CORO_SAVE_ALL;
1148	coro->flags = CF_NEW;	1499	coro->flags = CF_NEW;
1149		1500
		1501	if (coro_first) coro_first->prev = coro;
		1502	coro->next = coro_first;
		1503	coro_first = coro;
		1504
1150	hv = newHV ();	1505	coro->hv = hv = newHV ();
1151	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1506	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1507	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1153		1508
		1509	av_extend (coro->args, items - 1);
1154	for (i = 1; i < items; i++)	1510	for (i = 1; i < items; i++)
1155	av_push (coro->args, newSVsv (ST (i)));	1511	av_push (coro->args, newSVsv (ST (i)));
1156	}	1512	}
1157	OUTPUT:	1513	OUTPUT:
1158	RETVAL	1514	RETVAL
1159		1515
1160	int	1516	# these not obviously related functions are all rolled into the same xs
1161	save (SV *coro, int new_save = -1)	1517	# function to increase chances that they all will call transfer with the same
1162	CODE:	1518	# stack offset
1163	RETVAL = api_save (coro, new_save);
1164	OUTPUT:
1165	RETVAL
1166
1167	void	1519	void
1168	_set_stacklevel (...)	1520	_set_stacklevel (...)
1169	ALIAS:	1521	ALIAS:
1170	Coro::State::transfer = 1	1522	Coro::State::transfer = 1
1171	Coro::schedule = 2	1523	Coro::schedule = 2
…		…
1184		1536
1185	case 1:	1537	case 1:
1186	if (items != 2)	1538	if (items != 2)
1187	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1539	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1188		1540
1189	prepare_transfer (&ta, ST (0), ST (1));	1541	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1190	break;	1542	break;
1191		1543
1192	case 2:	1544	case 2:
1193	prepare_schedule (&ta);	1545	prepare_schedule (aTHX_ &ta);
1194	break;	1546	break;
1195		1547
1196	case 3:	1548	case 3:
1197	prepare_cede (&ta);	1549	prepare_cede (aTHX_ &ta);
1198	break;	1550	break;
1199		1551
1200	case 4:	1552	case 4:
1201	if (!prepare_cede_notself (&ta))	1553	if (!prepare_cede_notself (aTHX_ &ta))
1202	XSRETURN_EMPTY;	1554	XSRETURN_EMPTY;
1203		1555
1204	break;	1556	break;
1205	}	1557	}
1206		1558
1207	BARRIER;	1559	BARRIER;
1208	TRANSFER (ta);	1560	TRANSFER (ta);
		1561
		1562	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1563	XSRETURN_YES;
1209	}	1564	}
1210		1565
1211	bool	1566	bool
1212	_destroy (SV *coro_sv)	1567	_destroy (SV *coro_sv)
1213	CODE:	1568	CODE:
1214	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1569	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1215	OUTPUT:	1570	OUTPUT:
1216	RETVAL	1571	RETVAL
1217		1572
1218	void	1573	void
1219	_exit (code)	1574	_exit (code)
…		…
1221	PROTOTYPE: $	1576	PROTOTYPE: $
1222	CODE:	1577	CODE:
1223	_exit (code);	1578	_exit (code);
1224		1579
1225	int	1580	int
		1581	cctx_stacksize (int new_stacksize = 0)
		1582	CODE:
		1583	RETVAL = coro_stacksize;
		1584	if (new_stacksize)
		1585	coro_stacksize = new_stacksize;
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
1226	cctx_count ()	1590	cctx_count ()
1227	CODE:	1591	CODE:
1228	RETVAL = cctx_count;	1592	RETVAL = cctx_count;
1229	OUTPUT:	1593	OUTPUT:
1230	RETVAL	1594	RETVAL
…		…
1234	CODE:	1598	CODE:
1235	RETVAL = cctx_idle;	1599	RETVAL = cctx_idle;
1236	OUTPUT:	1600	OUTPUT:
1237	RETVAL	1601	RETVAL
1238		1602
		1603	void
		1604	list ()
		1605	PPCODE:
		1606	{
		1607	struct coro *coro;
		1608	for (coro = coro_first; coro; coro = coro->next)
		1609	if (coro->hv)
		1610	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1611	}
		1612
		1613	void
		1614	call (Coro::State coro, SV *coderef)
		1615	ALIAS:
		1616	eval = 1
		1617	CODE:
		1618	{
		1619	if (coro->mainstack)
		1620	{
		1621	struct coro temp;
		1622
		1623	if (!(coro->flags & CF_RUNNING))
		1624	{
		1625	save_perl (aTHX_ &temp);
		1626	load_perl (aTHX_ coro);
		1627	}
		1628
		1629	{
		1630	dSP;
		1631	ENTER;
		1632	SAVETMPS;
		1633	PUSHMARK (SP);
		1634	PUTBACK;
		1635
		1636	if (ix)
		1637	eval_sv (coderef, 0);
		1638	else
		1639	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1640
		1641	SPAGAIN;
		1642	FREETMPS;
		1643	LEAVE;
		1644	PUTBACK;
		1645	}
		1646
		1647	if (!(coro->flags & CF_RUNNING))
		1648	{
		1649	save_perl (aTHX_ coro);
		1650	load_perl (aTHX_ &temp);
		1651	}
		1652	}
		1653	}
		1654
		1655	SV *
		1656	is_ready (Coro::State coro)
		1657	PROTOTYPE: $
		1658	ALIAS:
		1659	is_ready = CF_READY
		1660	is_running = CF_RUNNING
		1661	is_new = CF_NEW
		1662	is_destroyed = CF_DESTROYED
		1663	CODE:
		1664	RETVAL = boolSV (coro->flags & ix);
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	void
		1669	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1670
		1671	SV *
		1672	has_stack (Coro::State coro)
		1673	PROTOTYPE: $
		1674	CODE:
		1675	RETVAL = boolSV (!!coro->cctx);
		1676	OUTPUT:
		1677	RETVAL
		1678
		1679	int
		1680	is_traced (Coro::State coro)
		1681	PROTOTYPE: $
		1682	CODE:
		1683	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	IV
		1688	rss (Coro::State coro)
		1689	PROTOTYPE: $
		1690	ALIAS:
		1691	usecount = 1
		1692	CODE:
		1693	switch (ix)
		1694	{
		1695	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1696	case 1: RETVAL = coro->usecount; break;
		1697	}
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701
1239	MODULE = Coro::State PACKAGE = Coro	1702	MODULE = Coro::State PACKAGE = Coro
1240		1703
1241	BOOT:	1704	BOOT:
1242	{	1705	{
1243	int i;	1706	int i;
1244		1707
		1708	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1709	get_sv ("Coro::POOL_RSS" , TRUE); /* silence stupid 5.10 warning */
		1710	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1711	get_sv ("Coro::POOL_SIZE" , TRUE); /* silence stupid 5.10 warning */
		1712	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1713	get_av ("Coro::async_pool", TRUE); /* silence stupid 5.10 warning */
		1714
		1715	coro_current = get_sv ("Coro::current", FALSE);
		1716	SvREADONLY_on (coro_current);
		1717
1245	coro_stash = gv_stashpv ("Coro", TRUE);	1718	coro_stash = gv_stashpv ("Coro", TRUE);
1246		1719
1247	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1720	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1248	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1721	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1249	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1722	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1250	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1723	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1251	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1724	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1252	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1725	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1253		1726
1254	coro_current = get_sv ("Coro::current", FALSE);
1255	SvREADONLY_on (coro_current);
1256
1257	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1727	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1258	coro_ready[i] = newAV ();	1728	coro_ready[i] = newAV ();
1259		1729
1260	{	1730	{
1261	SV *sv = perl_get_sv("Coro::API", 1);	1731	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1732	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1262		1733
1263	coroapi.schedule = api_schedule;	1734	coroapi.schedule = api_schedule;
1264	coroapi.save = api_save;
1265	coroapi.cede = api_cede;	1735	coroapi.cede = api_cede;
1266	coroapi.cede_notself = api_cede_notself;	1736	coroapi.cede_notself = api_cede_notself;
1267	coroapi.ready = api_ready;	1737	coroapi.ready = api_ready;
1268	coroapi.is_ready = api_is_ready;	1738	coroapi.is_ready = api_is_ready;
1269	coroapi.nready = &coro_nready;	1739	coroapi.nready = &coro_nready;
…		…
1310	CODE:	1780	CODE:
1311	RETVAL = boolSV (api_ready (self));	1781	RETVAL = boolSV (api_ready (self));
1312	OUTPUT:	1782	OUTPUT:
1313	RETVAL	1783	RETVAL
1314		1784
1315	SV *
1316	is_ready (SV *self)
1317	PROTOTYPE: $
1318	CODE:
1319	RETVAL = boolSV (api_is_ready (self));
1320	OUTPUT:
1321	RETVAL
1322
1323	int	1785	int
1324	nready (...)	1786	nready (...)
1325	PROTOTYPE:	1787	PROTOTYPE:
1326	CODE:	1788	CODE:
1327	RETVAL = coro_nready;	1789	RETVAL = coro_nready;
1328	OUTPUT:	1790	OUTPUT:
1329	RETVAL	1791	RETVAL
1330		1792
		1793	void
		1794	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1795	PROTOTYPE: $;$
		1796	CODE:
		1797	SvREFCNT_dec (self->throw);
		1798	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1799
		1800	# for async_pool speedup
		1801	void
		1802	_pool_1 (SV *cb)
		1803	CODE:
		1804	{
		1805	struct coro *coro = SvSTATE (coro_current);
		1806	HV *hv = (HV *)SvRV (coro_current);
		1807	AV *defav = GvAV (PL_defgv);
		1808	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1809	AV *invoke_av;
		1810	int i, len;
		1811
		1812	if (!invoke)
		1813	croak ("\3async_pool terminate\2\n");
		1814
		1815	SvREFCNT_dec (coro->saved_deffh);
		1816	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1817
		1818	hv_store (hv, "desc", sizeof ("desc") - 1,
		1819	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1820
		1821	invoke_av = (AV *)SvRV (invoke);
		1822	len = av_len (invoke_av);
		1823
		1824	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1825
		1826	if (len > 0)
		1827	{
		1828	av_fill (defav, len - 1);
		1829	for (i = 0; i < len; ++i)
		1830	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1831	}
		1832
		1833	SvREFCNT_dec (invoke);
		1834	}
		1835
		1836	void
		1837	_pool_2 (SV *cb)
		1838	CODE:
		1839	{
		1840	struct coro *coro = SvSTATE (coro_current);
		1841
		1842	sv_setsv (cb, &PL_sv_undef);
		1843
		1844	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1845	coro->saved_deffh = 0;
		1846
		1847	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1848	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1849	croak ("\3async_pool terminate\2\n");
		1850
		1851	av_clear (GvAV (PL_defgv));
		1852	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1853	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1854
		1855	coro->prio = 0;
		1856
		1857	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1858	api_trace (coro_current, 0);
		1859
		1860	av_push (av_async_pool, newSVsv (coro_current));
		1861	}
		1862
		1863
1331	MODULE = Coro::State PACKAGE = Coro::AIO	1864	MODULE = Coro::State PACKAGE = Coro::AIO
1332		1865
1333	SV *	1866	SV *
1334	_get_state ()	1867	_get_state ()
1335	CODE:	1868	CODE:

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